Synthesis and structure of oxotechnetium(V) complexes of N,N'-ethylenebis(acetylacetone thioimine) and N,N'-ethylenebis(benzylacetone thioimine)

Abstract The synthesis, characterization, structural studies in solution and single-crystal X-ray analysis of two new oxotechnetium(V) complexes with N,N' -ethylenebis(acetylacetone thioimine) and N,N' -ethylenebis(benzylacetone thioimine) are reported. The crystals of the aqua [ N,N' -ethylenebis(acetylacetone thioiminato)] oxotechnetium(V) complex, TcO(H 2 O)C 12 H 18 N 2 S 2 Cl, are orthorhombic, space group Pbcn with a =24.609(1), b =12.4708(6), c =10.9951(5) A, V =3374.4(1) A 3 and Z=8. The complex has a distorted octahedral coordination geometry containing a trans -oxoaquatechnetium(V) core. The UV-Vis and 1 H NMR spectra of the complexes in solution are solvent dependent indicating the presence of various ligands at the trans axial position.